While I am not going to use everything in this book, it is useful for everything I need it for. This book, combined with Trailblazer, elements of the PFRPG Core and the Gaslight OGL game give me just enough additional material to keep me going forever. Adamant sometimes doesnt quite give me what I expect, but they always have well thought out products. This one is no exception. Yes, I do prefer Crafty's FantasyCraft over PFRPG, but even so this book is just as useful to me as a GM.